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Urban Cougar Trapper
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Discussion Starter #1
I know I can restrict the water from them pump by using a gate valve on line coming in off pump ( no provisions for thermostat / competition blower intake is what I've got ) . Just seeing what temps you guys are able to maintain and how you are doing it
Someone always comes up with a better mousetrap
 

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Highaboosta
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3,431 Posts
My motor ran about the same temp on gas, E85, or Methanol.
If its running too cold your too rich.
Restricting your water flow when it's a fueling problem is the wrong way to go.

An O2 sensor is your friend.
 

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Urban Cougar Trapper
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976 Posts
Discussion Starter #3
My motor ran about the same temp on gas, E85, or Methanol.
If its running too cold your too rich.
Restricting your water flow when it's a fueling problem is the wrong way to go.

An O2 sensor is your friend.
Mark , Sullens said to run motor at a minimum of 160-170* for proper fuel vaporization and burn , just seeing if there was a better way to regulate water temps than choking back supply from pump ....and I have no way to run a thermostat which would be ideal
 

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Kevin from CSU has said the same thing, yet I've kind of gone the route of marks thinking. I've thought about a closed cooling system with a heat exchanger, but I have other projects using up my time.
 

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Highaboosta
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3,431 Posts
Mark , Sullens said to run motor at a minimum of 160-170* for proper fuel vaporization and burn , just seeing if there was a better way to regulate water temps than choking back supply from pump ....and I have no way to run a thermostat which would be ideal
Ok so your engine temp was low on gas originally then ?

Back when I ran a jet I had the feed line from the pump restricted to a 5/16 ? ID and ran it that way successfully for years on the turbo engine.
Even restricted it still got over 50# block water pressure at WOT.
It may not be the best way but there are not many options.

I tuned a FAST system on a friends 25 Daytona and those guys like to run them with no thermostat and the engine idles at 100 degrees.
I had to set it to go into closed loop at 95 degrees.
Then at WOT for a long run the temp would get up near 200 degrees.
It was a difficult thing to tune that way.
With a medium size procharger and 6# boost he runs around 115 with it.
There are only 2 of us running E85 in boats around here.
 

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Urban Cougar Trapper
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976 Posts
Discussion Starter #6
Always ran valve (3/8") off pump and inlet hose wide open with 2 overboard dumps out of block on old motor ...temps were about 120-140* on AvGas
i hear what you are saying about restriction , I might be able to thread water fitting going into motor and try different size "pills " choking back water

only thing I'm worried about is picking up a stick ,small rock , wad of grass or water Lilly and plugging line up and overheating :confused:
 

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Restricting at the pump opens up the opportunity for air pockets in the engine restricting the outlet exposes the engine to pump pressure.

You can run a regulator bypass type IMO for the pressure and a sea strainer if you are worried about debris.

I generally run smaller discharge hoses to slow the flow down and install a bypass regulator for pressure
 

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pres reg. valve

I've run this pressure regulating valve on the inlet line with very good results. easy to adjust as necessary with set screw to hold setting. I could quickly see the results of pressure setting changes in both my t-stat location, mech. temp guage and my dash mounted mech. oil temp. guage. (send'g unit in oil pan) I ran ball valves on inlet and exit line to control flow. With a ball valve you can quickly see at a glance what your degree of valve restriction is unlike a gate valve. Restricted exit line flow to insure complete block/head filling. I ran -10 or -12 inlet and -8 or exit line if I recall correctly, never any issues. I ran a 540" n/a, pump gas deal. I flogged it daily for extended periods of time for my entertainment purposes. I liked to end my day with hot lap sessions, simulating circle racing, for at least half hour sessions.
I've also read alot of positive comments about a banderlog valve but obviously have no experience with them. I hope this is of some help.
 

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Mark , Sullens said to run motor at a minimum of 160-170* for proper fuel vaporization and burn , just seeing if there was a better way to regulate water temps than choking back supply from pump ....and I have no way to run a thermostat which would be ideal
Do you have an oil temp gauge? On an average day my oil temp will be 200 ish....and unless I am at a looooong idle....my water temp gauge wont move off its lowest setting. If I had 10 bucks for every time this came up.......I could almost afford my ex wife:)sphss
 
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